Update TEST_MAPPING am: 03798cdfa2

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/matches/+/2108554

Change-Id: I1834bd088a2da6f76495bd7e64cc91b86c703607
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>